Results 61 to 70 of about 753,723 (234)
A Multicolour Photometric Study of the neglected eclipsing binary FT Ursae Majoris
, 2011 The multicolour photometric observations of the neglected eclipsing binary FT Ursae Majoris (FT UMa) were obtained in 2010. The 2003 version of Wilson-Devinney code was used to analyze the light curves in $B$, $V$, and $R$ bands simultaneously.
Bell +8 more
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A Analysis of the Light and Radial Velocity Curves of do CAS [PDF]
Journal of Astronomy and Space Sciences, 2000 DO Cas is a short period (P=0.68day) eclipsing binary star and is classified as a near-contact binary by Shaw (1990). There is no published radial velocity curve for this short period binary after Mannino (1958).
Young Sook Ahn, Ho-Il Kim, Woo-Baik Lee
doaj
A CCD photometric study of the late type contact binary EK Comae Berenices
, 2010 We present CCD photometric observations of the W UMa type contact binary EK Comae Berenices using the 2 metre telescope of $IUCAA$ Girawali Observatory, India. The star was classified as a W UMa type binary of subtype-W by \citet{sam1996}. The new V band
Borovicka +31 more
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, 2003 Despite being the most abundant (by space density) of interacting binary stars, W Ursae Majoris (W UMa) stars are not understood structurally. Their stellar components are in physical contact, and share a common convective envelope. Observations demand large-scale energy exchange between components, as do considerations of hydrostatic and thermal ...
openaire +2 more sources
Detailed Analysis of Six Contact Binaries and their Possible Origin
The Astronomical JournalA photometric investigation of six binary systems of the W Ursae Majoris (W UMa)-type is presented. We extracted primary and secondary minima from the Transiting Exoplanet Survey Satellite observations of these systems.
Somayeh Soomandar +2 more
doaj +1 more source
The dynamical stability of W Ursae Majoris-type systems
, 2008 Theoretical study indicates that a contact binary system would merge into a rapidly rotating single star due to tidal instability when the spin angular momentum of the system is more than a third of its orbital angular momentum.
Albayrak +32 more
core +1 more source
Lessons from the High-resolution Spectroscopy of AW UMa and ϵ CrA: Is the Lucy Model Valid?
The Astronomical JournalA re-examination of high-resolution spectral monitoring of the W UMa–type binaries AW UMa and ϵ CrA casts doubt on the widely utilized L. B. Lucy model of contact binaries.
Slavek M. Rucinski
doaj +1 more source
Mass Ratio Estimates for Overcontact Binaries Using the Derivatives of Light Curves
The Astrophysical Journal, 2023 The photometric mass ratios of eclipsing binaries are usually estimated by light-curve modeling with an iterative method. We propose a new method for estimating the photometric mass ratio of an overcontact binary using the derivatives of a light curve ...
Shinjirou Kouzuma
doaj +1 more source
Hydrodynamics of Coalescing Binary Neutron Stars: Ellipsoidal Treatment
, 1994 We employ an approximate treatment of dissipative hydrodynamics in three dimensions to study the coalescence of binary neutron stars driven by the emission of gravitational waves.
Lai, Dong, Shapiro, Stu
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The Astrophysical Journal, 1981 Densities, corrected primary colors, minimum periods, inferred masses, luminosities, and specific angular momenta are computed from data on 37 W Ursae Majoris systems. A-type systems, having lower densities and angular momenta than the W-type systems, are shown to be evolved, and a new class of contact binary is identified, the OO Aquilae systems ...
openaire +2 more sources